﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo07
{
   
        class Swallow : BirdType
        {
            public void FlyToSouth()
            {
                Console.WriteLine("我能往南飞");
            }

            public override void Cry()
            {
                base.Cry();
                Console.WriteLine("叽叽叽");
           }
       }
 }

